The Morelli Nickel Titanium Reverse Curve of Spee Archwires Rectangular are superelastic NiTi wires that combine a pre-formed reverse curve of Spee with a rectangular cross-section. Because the wire fills the slot in both dimensions, bite opening is delivered together with third-order control, keeping anterior torque while the curve intrudes the incisors.
Key Features
Rectangular Cross-Section — engages the slot walls in the buccolingual dimension, so torque is expressed while the reverse curve works.
Pre-Formed Reverse Curve — the accentuated curve of Spee is built into the wire, delivering intrusive force on the anterior teeth without chairside bending.
Anterior Torque Maintenance — incisors are intruded with reduced crown tipping, an advantage the round version cannot provide.
Progressive Slot Fill — four sections, including the .016″ × .016″ square profile, allow a gradual increase in slot engagement.
Superelastic Force Delivery — continuous and predictable force levels with high spring back over a wide deflection range.
Bright Polished Surface — finished edges and a polished face keep friction low for sliding mechanics.
Technical Specifications
Material: Superelastic NiTi (Nickel Titanium)
Wire Cross-Section: Rectangular
Curvature: Reverse curve of Spee
Wire Sizes: .016″ × .016″ (0,40 × 0,40 mm), .016″ × .022″ (0,40 × 0,55 mm), .017″ × .025″ (0,43 × 0,63 mm), .019″ × .025″ (0,48 × 0,63 mm)
Arch: Upper and Lower
Purpose: Bite opening, deep and open bite correction, arch consolidation and expansion, retraction of flared, protruding incisors
Certifications: FDA Approved, CE Approved, ISO 9001:2015, ISO 13485:2016
Country of Manufacture: Brazil
Package Includes: 10 Morelli Nickel Titanium Reverse Curve of Spee rectangular archwires in the selected section and arch
Clinical Applications
Deep bite cases requiring torque control, where incisors must be intruded without losing inclination.
Retraction of flared, protruding incisors in the working phase, with the wire resisting the deepening of the curve.
Arch consolidation and expansion once alignment is complete and full slot engagement is indicated.
Opening a deep bite without losing incisor inclination?
The rectangular reverse curve is the sequence step that adds third-order control to the same superelastic force the round version delivers.